Firstly, it would be helpful to use a proper title, which could be anything you like, providing it gives the members here some idea what the thread is about, hence why you proberly have only my reply.
Anti-virus and Spyware protection will be the first thing to make sure you run full scans with, make sure both are upto date, then try a file integrity check on the windows files.
Then try updating/reinstalling drivers.
Failing all the above, reinstall OS..... if that doesnt help i'd start looking at troubleshooting a possible hardware fault.